The present disclosure provides a semiconductor manufacturing method. The method includes providing product data of a product, the product data including a sensitive product parameter; searching existing products according to the sensitive product parameter to identify a relevant product from the existing products; determining an initial value of a processing model parameter to the product using corresponding data of the relevant product; assigning the initial value of the processing model parameter to a processing model associated with a manufacturing process; thereafter, tuning a processing recipe using the processing model; and performing the manufacturing process to a semiconductor wafer using the processing recipe.